Free Online Video Trimmer
Cut your video to the perfect length — set start and end points, preview, and download instantly. Your video never leaves your device. No uploads, no account, completely free.
Drop your video here or click to browse
MP4, WebM, MOV, AVI, MKV — up to 2GBHow to trim a video online
Frequently asked questions
Is my video uploaded to a server?
No — everything happens locally in your browser using WebAssembly (FFmpeg.wasm). Your video file never leaves your device and no data is stored or transmitted to any server. This is fundamentally different from most online video tools, which upload your file to a remote server to process it.
What video formats does the trimmer support?
You can upload MP4, WebM, MOV, AVI, and MKV files. The output is always MP4 (H.264) for maximum compatibility across devices, players, and platforms.
Why does it take a moment to start the first time?
The first trim loads FFmpeg.wasm — a ~30MB WebAssembly build of FFmpeg that powers all the video processing. It downloads once per browser session. After that, any subsequent trims start immediately without downloading again.
Is there a file size limit?
VideoToolShack doesn't impose a hard file size limit, but very large files (over 1–2GB) may run slowly depending on your device's available RAM and CPU speed. For best performance we recommend keeping files under 500MB.
Will the trimmed video lose quality?
No — we use stream copy mode by default, which cuts the video without re-encoding. This means zero quality loss and very fast processing. The only trade-off is that start and end points are snapped to the nearest keyframe, which may be up to a second away from your chosen time.
Which browsers are supported?
The Video Trimmer works in any modern browser that supports WebAssembly and SharedArrayBuffer: Chrome 92+, Edge 92+, Firefox 90+, and Safari 15.2+. If your browser doesn't support it you'll see a clear error message.